114 CRUISE OF STEAMER OORWIN IN THE ARCTIC OCEAN. 



PODICIPID^. GREBES. 



PODICBPS POLBOLLI Reinh. 



(171.) Amekican Red-necked Grebe. 



Tlie.se Grebe.s are quite immeioiis, oceurriug along the entire American coast of Bering Sea, 

 and breeding from tlie I'enin.snla of Aliaska to tlie vicinity of the Straits. They are most 

 numerons, however, in autnmn, when they are found frequenting the sea; and some years from 

 ten to a dozen .s])eciniens may be secured, while in others but one or two will be seen. It is 

 unknown from the islands and the Asiatic shore of this sea, and the only portion of the Arctic 

 coast of which I have i)roof of its occurrence is in Kotzebue Sound, where it also nests in summer. 



DYTESAURITUS (Linn.) Ridgw 



(172.) Horned Grebe. 



Like the preceding, this bird is found all along the mainland shore of this sea, where, however, 

 it breeds very sparingly, being maiulj- an inland species. It is fouud quite frequently in the 

 interior, where it nests and visits the sea-coast during the autumnal migration. It is also found 

 on the shore of Kotzebue Sound, but is not known from the islands of this sea nor the Asiatic coast. 



COLYMBIDiE. LOONS. 

 COLYMBUS TORQUATUS Brunn. 



(17;j.) The Loon. 



This bird is found along the Bering Sea coa.st, on both sides, and also upon the shore of the 

 Arctic, breeding wherever found. It is not abundant in this region, neither is it rare. There i.s 

 no record of its occurrence ujjon anj' of the islands of this sea, although, as noted, it occurs on 

 both shores. 



COLYMBUS ADAMSI Gray. 



(174.) Great White-billed Loon. 



Tills bird, the largest of the Loons, has a circiimpolar distribution, although it is not known 

 to occnr in abundance at any locality. It is found breeding about Kotzebue Sound, whence the 

 natives brought nie several specimens, and reported the bird to be rather common there in summer. 

 I secured a young bird at Saint Michael's in autumn, and it is known to occur on the Asiatic 

 shore. There is no record of its presence about the Bering Sea Islands, but, like the other species 

 of Loons, it undoubtedly visits these islands, during tlie migrations at least. The difliculty of 

 studying the birds which frequent the sea about these storm-beaten islands is apparent, and 

 accounts for the little jirogress which can be made in determining the lull number of species ' 

 which are found in their vicinity. 



COLYMBUS ARCTICUS Linn. 



(175.) Black-throated Loon. 



This bird is found everywhere along the .shore of Bering Sea on the American coast, and is 

 very abundant, nesting along the shore from the Peninsula of Aliaska north to Kotzebue Sound. 

 It was also .seen in Bering Strait the first of July, and noteil on several occasions along the 

 Asiatic shore, where it also breeds. It has not been recorded from the islands of this sea, although 

 undoubtedly occurring there in the migrations. 



COLYMBUS PACIFICUS Lawr. 



(176.) Pacific Diver. 



This bird is very rare on the coast of Bering Sea. Among the large number of Black-throated 

 Loous secured by me, only one proves to belong to this bird, and the same proportion is found to 

 hold good with other collections which have been brought from that country. This specimen was 



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